CN105567135A - Polypropylene adhesive powder for anticorrosion pipelines and preparation method thereof - Google Patents
Polypropylene adhesive powder for anticorrosion pipelines and preparation method thereof Download PDFInfo
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- CN105567135A CN105567135A CN201511033588.1A CN201511033588A CN105567135A CN 105567135 A CN105567135 A CN 105567135A CN 201511033588 A CN201511033588 A CN 201511033588A CN 105567135 A CN105567135 A CN 105567135A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
- C09J123/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
- C09J123/14—Copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a polypropylene adhesive powder for anticorrosion pipelines and a preparation method thereof. The adhesive powder comprises the following components in percentage by weight: 5 to 35% of polypropylene adhesive resin, 30 to 70% of polyolefin based resin, 5 to 20% of flexibilizer, 1 to 5% of nano filler, 0 to 5% of mobility improver, and 0.1 to 0.5% of antioxidant; wherein the polyolefin based resin comprises at least one of homo-polymerized polypropylene, randomly copolymerized polypropylene, and block copolymerized polypropylene, and the flexibilizer comprises at least one of ethylene propylene diene monomer, ethylene-vinyl acetate copolymer, polyethylene octene elastomer (POE), and SEBS. The preparation method comprises the following steps: (1) mixing raw materials, and extruding and granulating the raw materials by a double screw extruder; (2) grinding the granules of polypropylene adhesive. The powder can naturally perform levelling during the construction process, moreover, the peeling strength between expoxy powder and external polypropylene is extremely high, and the powder can be applied to corrosion prevention of pipeline joints and pipelines.
Description
Technical field
The present invention relates to paint field, relate to the application of functional poly propylene and blend thereof, be specifically related to a kind of anti-corrosion pipeline polypropylene adhesive powder and preparation method thereof.
Background technology
From eighties of last century nineties so far, the many employings in pipeline corrosion protection field three layers of (3PE) structures composition, mainly comprise nexine epoxy powder layer, middle layer adhesive linkage, outer layer polyethylene protective layer.In this three-decker, epoxy powder plays the preservative activity of most critical, and middle adhesive layer and outer field polyethylene layer are the protections to epoxy powder, ensures that epoxy powder can protect steel pipe better.Along with the demand of oil and gas equal energy source is increasing, the energy capacity of easy producing area cannot meet the demands, oil and gas exploitation progressively to march toward the exceedingly odious environment such as deep-sea and tropical rain forest and area.So, also more and more higher to the requirement of pipeline corrosion protection, and traditional 3PE cannot meet the severe environment demands such as high temperature resistant.The anticorrosion excellent combination property of 3PP, epoxy powder and polyacrylic advantage are integrated in one, have that good adhesiveproperties, high electrical isolation, excellent waterproof, moisture barrier properties energy, density are little, chemistry-resistant characteristic and good physical strength, shock resistance, can be used for all kinds of environment, be specially adapted to the environment of the higher harshness of coating machine performance, the stress of resistance to soil and the requirement of resistance barrier properties as high in broken (ovum) stone soil, cubic meter of stone section, soil moisture content, biological activity is frequent, root system of plant developed regions.120 DEG C can be reached for its use temperature of extruded polypropylene, even short-term can bear 140 DEG C of high temperature.3PP aseptic technic enters China in 20 beginnings of the century, and current scale is increasing, day by day comes into one's own.
The anticorrosion defect having himself equally of 3PP, main manifestations is: 1, traditional domestic and international steel pipe, three layers of PP are coated with formable layer and all adopt forcing machine to extrude intermediate and outer layer polypropylene respectively, it is made to be coated on outside epoxy primer, for every suit producing shaped device, need two large extrusion moulding apparatus, energy consumption is bigger than normal.What 2, traditional technology was extruded due to melt viscosity oxidant layer and the jacket bed of material is all diaphragm, no matter adopt Wrapping formed or extrusion-cladding molded, for spiral welded steel pipe or straight weld steel pipe, the thickness of weld seam preservative coat is always thinning, and because negative pressure is too small or rolling-compaction roller rolls eakiness, the total existing defects in weld seam side.3, under low-temperature condition, because intennediate bond oxidant layer and epoxy powder primer do not exist Physical penetration, when preservative coat is subject to foreign impacts, may there is breakage in preservative coat impact zone.4, in joint and bend pipe, traditional method adopts single epoxy powder or is wound around polypropylene tape, and this anti-corrosion method affects very large by environmental factors and human factor, greatly reduce the preservative effect of preservative coat, the life-span of preservative coat is declined.Use powder adhesive effectively to overcome the above problems, reduce the anticorrosion defect of pipeline, greatly improve the work-ing life of pipeline.
Patent No. CN102052543A discloses a kind of compound PE powder thermospraying oil and gas pipeline corrosion protection coating, this corrosion protection coating is at the inwall of oil and gas pipeline or outer wall thermospray temperature curing epoxy low powder (PBE), tackiness agent (AD), modified PE powder three kinds of coating successively, and the inwall or outer wall of oil and gas pipeline are formed the corrosion protection coating of coblended interface.Patent No. CN102533162A describes the PE adhesive powder in 3PE anti-corrosion pipeline, but PE and PP material is essentially different, opening one's minds in component design process is different, the developing thought can not continuing to use PE goes to study PP, and the preparation method of PP powder is also completely different from the preparation method of PE powder in addition.
Summary of the invention
For the deficiencies in the prior art, an object of the present invention is to provide a kind of anti-corrosion pipeline polypropylene adhesive powder, this powder possesses the mechanical property of good dry powder flow, levelling property and excellence, is applicable to dusting technique, flame spraying process and have very high bonding strength with epoxy powder.
For achieving the above object, the present invention adopts following technical scheme: a kind of anti-corrosion pipeline polypropylene adhesive powder, and each raw materials by weight calculates and comprises:
As the preferred scheme of one of the present invention: described bonding polypropylene resin is obtained by following preparation technology: with at least one in homo-polypropylene and Co-polypropylene for matrix resin; Take maleic anhydride as grafted monomer, the mass concentration that grafted monomer accounts for bonding polypropylene resin raw materials is 1 ~ 2wt%; With dicumyl peroxide or benzoyl peroxide for initiator, the mass concentration that initiator accounts for bonding polypropylene resin raw materials is 0.05 ~ 0.1wt%; Add vinylbenzene or methyl methacrylate, the mass concentration that vinylbenzene or methyl methacrylate account for bonding polypropylene resin raw materials is 1 ~ 5wt%; Bonding polypropylene resin is obtained by reaction extrusion process.
The percentage of grafting of this bonding polypropylene resin reaches 1 ~ 2wt%; higher than common bonding polypropylene adhering resin; a small amount of interpolation can make polypropylene adhesive powder and epoxy layer by fabulous bonding force; epoxy powder is played a good protection; in the present invention program; I haven't seen you for ages lowers the cohesive force of hot melt adhesive powder for the consumption of bonding polypropylene resin, and consumption is crossed conference and caused hot melt adhesive powder to become fragile, and affects impact property and the environmental stress cracking resistance of preservative coat.
As the preferred scheme of one of the present invention: described polyolefin base resin comprises at least one in homo-polypropylene, atactic copolymerized polypropene and block copolymerization polypropylene.The effect of matrix resin is the dry powder flow and the levelling property that improve polypropylene adhesive powder.
As the preferred scheme of one of the present invention: described toughner comprises at least one in terpolymer EP rubber, ethene-vinyl acetate copolymer, polyethylene octene elastomer and SEBS.Adding toughner can make to mix between each component of polypropylene more even; improve polyacrylic processing characteristics; the impact property of polypropylene material can also be significantly improved, ensure that adhesive layer keeps good integrity, guard ring oxygen layer better in long-term use procedure.
As the preferred scheme of one of the present invention: described Nano filling comprises at least one in the nano-calcium carbonate of silane coupling agent process, nano zine oxide and nano silicon.Nano filling can improve the mechanical property of material and improve the bonding force of material and epoxy layer.
As the preferred scheme of one of the present invention: described flow ability modifying agent is polyacrylic ester.Adding of flow ability modifying agent can the surface tension of regulation system melt, improves the levelling property of system.Application levelling rear surface without orange peel line, sagging phenomenon, coat inside free of pinholes.
As the preferred scheme of one of the present invention: described oxidation inhibitor comprises at least one in antioxidant 1010, irgasfos 168, oxidation inhibitor 245, UV light absorber and photostabilizer.Oxidation inhibitor mainly improves heat aging and the photooxidation aging property of material, improves the working life of material.
Another object of the present invention is the preparation method providing a kind of anti-corrosion pipeline polypropylene adhesive powder; The method adopts twin screw extrusion process to obtain polypropylene adhesive pellet, obtains adhesive powder by liquid nitrogen freezing pulverizing mill abrasive dust.
For achieving the above object, the present invention adopts following technical scheme:
1), after raw material being mixed by proportioning, be under the condition of 190 ~ 220 DEG C in temperature, by twin screw extruder extruding pelletization, obtain polypropylene adhesive material grain;
2) by step 1) grinding of the polypropylene adhesive material grain that obtains, obtain polypropylene adhesive powder.
As the preferred scheme of one of the present invention, step 1) in, described polypropylene adhesive material grain temperature be 23 DEG C, under pressure is the condition of 2.16kg, its melting index is 4 ~ 10g/10min; Tensile strength>=the 20MPa of described polypropylene adhesive material grain, elongation at break>=400%, normal temperature shock strength>=50KJ/m
2.
As the preferred scheme of one of the present invention, described step 2) in, polypropylene adhesive material grain is ground by chilled nitrogen milling equipment, and grinding temperature is-20 ~-80 DEG C; Preferably, the preferably temperature of grinding effect is-40 ~-60 DEG C.After grinding, the percent of pass that powder particle 60 order sieves is 90-100%, and 80 order percent of pass are 80-90%, and adhesive powder dry powder flow is good, powder suspension Bi≤28%, An Xi Jiao≤32 °.
Beneficial effect of the present invention is:
1, the polypropylene adhesive powder that prepared by the present invention does not need to add tackifier, adopt the mechanical property of the mobility of flow ability modifying agent raising dry powder, levelling property and excellence, in conjunction with the stripping strength of adding Nano filling raising material, powder has good environmental stress crack resistance, heat aging property, resistance to UV aging energy, crushing resistance, erosion resistance, be applicable to dusting technique, flame spraying process and have very high bonding strength with epoxy powder.
2, the present invention can simplify the production technique of anti-corrosion pipeline, reduces production cost; Can use spraying production technique, powder flow leveling is excellent, preservative coat thinner evenly, save material cost.
3, the present invention can also be applied to the anticorrosion of pipe joint and elbow, improves the preservative effect of interface and elbow.
Embodiment
Below, in conjunction with embodiment, the present invention is described further:
Specific embodiment:
Embodiment 1
Present embodiment discloses a kind of preparation method of anti-corrosion pipeline polypropylene adhesive powder, comprise the following steps:
1) get the raw materials ready:
2) after raw material being mixed by high speed blender by proportioning, be under the condition of 210 DEG C in temperature, by twin screw extruder extruding pelletization, obtain polypropylene adhesive material grain; Extruder screw rotating speed 400rpm, twin screw length-to-diameter ratio L/D=35:1.
3) by step 2) the polypropylene adhesive material grain that obtains adopts the grinding of liquid nitrogen freezing machinery method pulverising mill disc flour mill, and grinding temperature obtains polypropylene adhesive powder for-40 DEG C; The percent of pass that this powder particle 60 order sieves is 90-100%, and 80 order percent of pass are 80-90%, and adhesive powder dry powder flow is good, powder suspension Bi≤28%, An Xi Jiao≤32 °.
Embodiment 2
1) get the raw materials ready:
2) after raw material being mixed by high speed blender by proportioning, be under the condition of 220 DEG C in temperature, by twin screw extruder extruding pelletization, obtain polypropylene adhesive material grain; Extruder screw rotating speed 400rpm, twin screw length-to-diameter ratio L/D=35:1.
3) by step 2) the polypropylene adhesive material grain that obtains adopts the grinding of liquid nitrogen freezing machinery method pulverising mill disc flour mill, and grinding temperature obtains polypropylene adhesive powder for-50 DEG C; The percent of pass that this powder particle 60 order sieves is 90-100%, and 80 order percent of pass are 80-90%, and adhesive powder dry powder flow is good, powder suspension Bi≤28%, An Xi Jiao≤32 °.
Embodiment 3
1) get the raw materials ready:
2) after raw material being mixed by high speed blender by proportioning, be under the condition of 210 DEG C in temperature, by twin screw extruder extruding pelletization, obtain polypropylene adhesive material grain; Extruder screw rotating speed 400rpm, twin screw length-to-diameter ratio L/D=35:1.
3) by step 2) the polypropylene adhesive material grain that obtains adopts the grinding of liquid nitrogen freezing machinery method pulverising mill disc flour mill, and grinding temperature obtains polypropylene adhesive powder for-60 DEG C; The percent of pass that this powder particle 60 order sieves is 90-100%, and 80 order percent of pass are 80-90%, and adhesive powder dry powder flow is good, powder suspension Bi≤28%, An Xi Jiao≤32 °.
The polypropylene adhesive powder obtained by above-described embodiment 1-3, be coated with by flame spraying process and be contained on steel pipe, nexine is by electrostatic spraying epoxy powder.The performance index of its material and preservative coat are as shown in table 1:
The performance index of table 1 preservative coat
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection domain of the claims in the present invention.
Claims (10)
1. an anti-corrosion pipeline polypropylene adhesive powder, is characterized in that each raw materials by weight calculates and comprises:
2. anti-corrosion pipeline polypropylene adhesive powder as claimed in claim 1, is characterized in that: described bonding polypropylene resin is obtained by following preparation technology: with at least one in homo-polypropylene and Co-polypropylene for matrix resin; Take maleic anhydride as grafted monomer, the mass concentration that grafted monomer accounts for bonding polypropylene resin raw materials is 1 ~ 2wt%; With dicumyl peroxide or benzoyl peroxide for initiator, the mass concentration that initiator accounts for bonding polypropylene resin raw materials is 0.05 ~ 0.1wt%; Add vinylbenzene or methyl methacrylate, the mass concentration that vinylbenzene or methyl methacrylate account for bonding polypropylene resin raw materials is 1 ~ 5wt%; Bonding polypropylene resin is obtained by reaction extrusion process.
3. anti-corrosion pipeline polypropylene adhesive powder as claimed in claim 1, is characterized in that: described polyolefin base resin comprises at least one in homo-polypropylene, atactic copolymerized polypropene and block copolymerization polypropylene.
4. anti-corrosion pipeline polypropylene adhesive powder as claimed in claim 1, is characterized in that: described toughner comprises at least one in terpolymer EP rubber, ethene-vinyl acetate copolymer, polyethylene octene elastomer and SEBS.
5. anti-corrosion pipeline polypropylene adhesive powder as claimed in claim 1, is characterized in that: described Nano filling comprises at least one in the nano-calcium carbonate of silane coupling agent process, nano zine oxide and nano silicon.
6. anti-corrosion pipeline polypropylene adhesive powder as claimed in claim 1, is characterized in that: described flow ability modifying agent is polyacrylic ester.
7. anti-corrosion pipeline polypropylene adhesive powder as claimed in claim 1, is characterized in that: described oxidation inhibitor comprises at least one in antioxidant 1010, irgasfos 168, oxidation inhibitor 245, UV light absorber and photostabilizer.
8. the preparation method of the anti-corrosion pipeline polypropylene adhesive powder as described in as arbitrary in claim 1-7, is characterized in that comprising the following steps:
1), after raw material being mixed by proportioning, be under the condition of 190 ~ 220 DEG C in temperature, by twin screw extruder extruding pelletization, obtain polypropylene adhesive material grain;
2) by step 1) grinding of the polypropylene adhesive material grain that obtains, obtain polypropylene adhesive powder.
9. the anti-corrosion pipeline as claimed in claim 8 preparation method of polypropylene adhesive powder, it is characterized in that: step 1) in, described polypropylene adhesive material grain temperature be 23 DEG C, under pressure is the condition of 2.16kg, its melting index is 4 ~ 10g/10min; Tensile strength>=the 20MPa of described polypropylene adhesive material grain, elongation at break>=400%, normal temperature shock strength>=50KJ/m
2.
10. the anti-corrosion pipeline preparation method of polypropylene adhesive powder as claimed in claim 8, is characterized in that: described step 2) in, polypropylene adhesive material grain is ground by chilled nitrogen milling equipment, and grinding temperature is-20 ~-80 DEG C.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105950061A (en) * | 2016-05-16 | 2016-09-21 | 天津纽威特橡胶制品股份有限公司 | Adhering glue for table tennis racket surface rubber |
| CN106479401A (en) * | 2016-11-30 | 2017-03-08 | 黄山贝诺科技有限公司 | A kind of anti-corrosion pipeline polypropylene adhesive powder and preparation method thereof |
| CN106854311A (en) * | 2016-12-31 | 2017-06-16 | 广州鹿山新材料股份有限公司 | A kind of 3PP anti-corrosion pipelines coating outer layer polypropylene powder and preparation method thereof |
| CN107779128A (en) * | 2016-08-25 | 2018-03-09 | 广东协宏无纺布科技有限公司 | A kind of super large length non-woven fabrics splices machine |
| CN110452442A (en) * | 2019-08-26 | 2019-11-15 | 西南交通大学 | A kind of percolate transports tubing and preparation method thereof |
| CN110699013A (en) * | 2019-11-04 | 2020-01-17 | 巢进化学(上海)有限公司 | Hot melt adhesive for bonding metal and plastic and preparation method thereof |
| CN111073524A (en) * | 2019-12-27 | 2020-04-28 | 上海邦中高分子材料股份有限公司 | Bonding resin for PU foam and preparation method thereof |
| CN111978890A (en) * | 2020-07-30 | 2020-11-24 | 深圳市亿铖达工业有限公司 | Hot-melt type outdoor display screen protective adhesive and preparation method thereof |
| CN115322474A (en) * | 2022-09-08 | 2022-11-11 | 青岛海纳新材料有限公司 | Polyolefin material for pipeline anticorrosive coating and preparation method thereof |
| CN115612424A (en) * | 2022-12-21 | 2023-01-17 | 广州鹿山新材料股份有限公司 | High-temperature-resistant adhesive and preparation method and application thereof |
| CN115850852A (en) * | 2022-11-21 | 2023-03-28 | 会通特种材料科技有限公司 | High-toughness polypropylene powder and preparation method thereof |
| CN115895348A (en) * | 2022-12-26 | 2023-04-04 | 广州鹿山新材料股份有限公司 | Polypropylene powder coating and preparation method and application thereof |
| CN115975437A (en) * | 2022-12-07 | 2023-04-18 | 西安氢创新材料有限公司 | Anticorrosive coating for hydrogen conveying pipeline and preparation method thereof |
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Application publication date: 20160511 |